Skin Infections & Allergies. Bacterial skin infections are the third major cause of itching in dogs. Most of these infections occur when the immune system is compromised by allergies, illness or stress.

Feline acne is a skin condition affecting the cats chin. Overactive oil (sebaceous) glands in the chin produce excess oil or sebum which predisposes cats to developing Feline Acne and Stud Tail. The oil, which is also called Sebum, plugs up the hair follicles in the chin which causes black heads called Comedomes to form.…